Definition of trans- in English:

prefix

• 1Across; beyond.

  ‘transcontinental’

  ‘transgress’

  1. 1.1On or to the other side of.
     Often contrasted with cis- (sense 1)
     ‘transatlantic’
     Often contrasted with cis- (sense 1)
     ‘transalpine’

• 2Through.

  ‘transonic’

  1. 2.1Into another state or place.
     ‘transform’
     ‘translate’
  2. 2.2Surpassing; transcending.
     ‘transfinite’

• 3Referring or relating to people whose sense of personal identity and gender does not correspond with their birth sex.

  ‘transgender’

  Compare with cis- (sense 2)

  ‘transphobia’

• 4usually trans-Chemistry
  Denoting molecules with trans arrangements of substituents.

  ‘trans-1,2-dichloroethene’

  1. 4.1Genetics Denoting alleles on different chromosomes.